I’d be in for one properly regulated for a SAAMI load if sub 2000 dollars. Skip the 410 imo
Wood stock with pistol grip, single trigger, ramp bead front with single fixed rear express blade. 18 inch barrels. 454 casull or 44 mag if possible, regulated at 75 metres
The issue with it being regulated for “45 high pressure” a load with no factory ammo is that regulation will have to be achieved by hand loading, if it is regulated for factory ammo then it will not be regulated with high pressure handloads. Without a system like baikal or several euro manufacturers over unders to regulate at home this will always be the case, short of total redesign this gun doesn’t have that. You can’t have your cake and eat it too sadly
With 2.5 inch 410 chambers shooting 45 colt the accuracy will be poor to begin with, shooting a load it isn’t regulated for? Abysmal
Some over under Italian rifles in this vein in 44 mag, 45 colt and 357. Would be interested in that too